782 



INDEX. 



Potentials required to produce dis- 

 cbarge in gases, on the, 479. 



Pressure, temperature, and density 

 of substances, relations between 

 the, 325. 



Pressure displacement of spectral 

 lines, on the, 499. 



Pringsheim (Dr. P.) on the normal 

 and the selective photoelectric 

 effect, 155. 



Probability, some problems in the 

 theory of, 745. 



Quartz mercury lamp, on extremely 

 lonq- waves emitted by the, 689. 



Radiation, on Hamilton's equations 

 and the partition of energy be- 

 tween matter and, 15. 



Radioactive equilibrium, on the 

 ratios which the amounts of sub- 

 stances in, bear to one another, 40. 



matter, on the ionization of the 



atmosphere due to, 26. 



Radioactivity of the Leinster granite, 

 on the, 102 ; of some igneous rocks 

 from antarctic regions, on the, 770. 



Radium and uranium, on the ratio 

 between, in minerals, 652. 



Radium emanation, on the relation 

 between viscosity and atomic 

 weight for, 49 ; on the behaviour 

 of, at low temperatures, 722. 



Raman (U. V.) photographs of vibra- 

 tion curves, 615 ; on the photo- 

 metric measurement of the obli- 

 quity factor of diffraction, 618. 



Rankine (Dr. A. 0.) on the relation 

 between viscosity and atomic 

 weight for the inert gases, 45. 



Rastall (R. H.) on dedolomitization 

 in the marble of Port Shepstone, 

 173. 



Rayleigh (Lord) on Bessel's func- 

 tions as applied to the vibrations 

 of a circular membrane, 53 ; hydro- 

 dynamical notes, 177 ; on a phy- 

 sical interpretation of Schlo- 

 milch's theorem in Bessel's func- 

 tions, 567 ; on the motion of solid 

 bodies through viscous liquid, 697. 



Refractive index of liquids, on the 

 measurement of the, 301. 



Relativity, on the derivation from 

 the principle of, of the fifth funda- 

 mental equation of the Maxwell- 

 Lorentz theory, 296; on the pro- 

 blem of uniform rotation treated 

 on the principle of, 319 ; on the 



problem of the uniform rotation 

 of a circular cylinder in its con- 

 nexion with the principle of, 342 ; 

 on the common sense of, 502 ; on, 

 and the conservation of momentum, 

 626. 

 Resistance, on the change of, of 

 iron and nickel wires in strong 

 magnetic fields, 122. 

 Richardson (L.) on the rhaetic de- 

 posits of Somerset, 279. 

 Richardson (Prof. O. W.) on the heat 

 liberated during the absorption of 

 electrons by different metals, 404. 

 Robinson (Dr. J.) on electric dust 



figures, 268. 

 Rocks, o;i the radioactivity of some 

 itrneous, from antarctic regions, 

 770. 

 Rontgen radiation, on homogeneous, 

 from vapours, 446. 



■ rays, oh an apparent softening 



of. in transmission through matter, 

 659. 

 Ross (A. D.) on magnetic testing, 1. 

 Rossi (R.) on the pressure displace- 

 ment of spectral lines, 499. 

 Rotation, on the problem of uniform, 

 treated on the principle of rela- 

 tivity, 319 : on the problem of the 

 uniform, of a circular cylinder in 

 its connexion with the principle of 

 relativity, 342. 

 Royds (T.) on the reflective power 

 of lamp- and platinum-black, 167. 

 Rubens (Prof. H.) on the focal isola- 

 tion of long heat-waves, 249; on 

 extremely long waves emitted by 

 the quartz mercurv lamp, 689. 

 Rudge (Prof. W. A. D.) on the elec- 

 trification of the air near the 

 Zambesi Falls, 611. 

 Russell (A. S.) on the y-rays of 



thorium and actinium, 130. 

 Rutherford (Prof. E.) on the scatter- 

 ing of a and /3 particles by matter 

 and the structure of the atom, 669. 

 Sadler (Dr. C. A.) on an apparent 

 softening of Rontgen rays in trans- 

 mission through matter, 659. 

 Schlomilch's theorem in Bessel's 

 functions, on a physical interpre- 

 tation of, 567. 

 Searle (G. F. C.) on a revolving 

 table method of determining the 

 curvature of spherical surfaces, 

 218. 



